Doorcheck



Dec. 1924 1,519,521

B. WEBER DOORCHECK Filed Feb. 1924 Zl/zimsms. Invenion M Bra/20 W256i" Tatented Dec. 16, 1924.

PATENT BRUNO WEBER, OF GHIOAGQ, ILLINOIS, ASSIG-NOR TO THE OSCAR C. ETXSON 00., A CORPORATION OF ILLIN'GIS.

DO ORCI-IECK.

Application filed February 9, 1924. Serial No. 691,591.

To all 'ZUhOHL it may concern:

Be it known that I, BRUNO lVEnnn, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful ln'lprovement in Doorchecks, of which the following is a full, clear, and exact description.

My invention relates to adjustable stops or checks used in connection with automatic door closers and functioning to hold a door open to any desired extentaccording to the position of adjustment of the stop or check against the closing torque of the automatic closer, but yieldable to a greater force to permit the door to close under the influence o1 the automatic closer.

An object of my invention is to provide such a mechanism which will be simple and relatively inexpensive, which will be easy to adjust, and which will be reliable in its operation and sturdy and durable in its construction. Other objects and advantages of my invention will appear from the following description.

Tn accordance with my invention 1 provide an adjustable stop or check member which is carried by and moves with one of the two arms of the usual automatic closer and which is positioned to engage the other arm and by reason of such engagement resiliently hold the two arms against further relative movement until additional force is applied to the door, one of the two engaging parts being arranged to yield under such force and permit the parts to pass. In this way the strain incident to the checking and holding action is taken entirely by the arms. Preferably the stop element consists of a spring leaf or plate mounted on the pivot stud coupling the two arms, and frictionally clamped to the lever arm of the closer so as to move therewith, and having its stop part positioned to strike the adjacent face of the fulcrum arm, thereby imposing the strain largely upon the fulcrum arm which has its attachment to the door casing.

My invention also includes various details of construction, and arrangements and combinations of parts as will hereinafter more fully appear. I shall now describe the illustrated embodimentof my invention and shall thereafter point out my invention in claims.

Fig. 1 is a perspective of a complete door closing mechanism containing my invention and shown asapplied to a door and door casing parts of which also appear in perspective.

Fig. 2 is a fragmentary elevation, partly in section of the parts at the joint between the arms and showing the parts in the stop engaging position.

Fig. 3 is a transverse section through the fulcrum arm on line 83 in Figure 2.

Fig. 4-, is a horizontal section through the joint on line et of Figure 2.

The closure mechanism to which my in vention is shown as applied consists of the usual actuating device in the casing 1, which is attached to the top of the door 2, together with the main or lever arm 3 secured on the spindle 4; of the actuating mechanism contained in the casing 1, and the link or fulcrum arm 5 secured to the top of the door casing 6, the inner ends of the two arms 3 and 5 being pivotally connected. The arm 5 is adjustable as to its length through a usual turn buckle construction consisting of a screw 7 and a loop or yoke member 8. The screw 7 has a universal connection with the door casing 6, being pivoted to a connecting piece 9 on a horizontal axis, which connecting piece is in turn pivoted to the anchor piece 10 on a vertical axis.

At the inner end of the arm 5 is a head 11*. the arms of the yoke piece 8 being pivoted to a rearward extension of the head on a horizontal axis. The arm 3 also terminates in an enlarged head or hub portion 3, and the pivot stud 12 passes through the heads 11 and 3.

The lower portion of the stud 12 is reduced in diameter so as to form a shoulder 13 substantially in the plane of the lower face of the head 11, and the extreme end of the stud 12 is screw threaded and has a nut 14 thereon.

Between the heads 11 and 3 is disposed a spring plate 15. This plate has an enlarged hub portion mounted upon the stud 12 underneath the shoulder 13, and from this hub portion the plate has an outwardly extending arm which is bent or inclined down slightly. The outer end of this plate is upwardly offset along the central longitudinal line, thus forming a peak shaped or double inclined stop portion 16. This stop portion is so disposed as to strike the lower part of the rearward extension of the head 11 during the relative movements of the arms 3 and 5 in the closing and opening operation of the door. The lower face of this rear- Wa'rd extension of the head 11 has its corners rounded ofl, as shown in Figures 2 and 3. In the normal position of the stop portion 16, it extends slightly above the plane of the bottom of the head 11, but the inclined faces of the head and of the stop portion serve to exert a \vedging Oren 111 action upon the stop portion 16 and Hex the arm 15 downwardl sufficiently to allow the stopportion to pass underneath the head 11. The resiliency of the plate 15 is sufliciently strong to hold the door in the stepped pesiti'o'n, shown in Fig Lite 3, against the closing tension of the mechanism in the casing 1. A further slight pull upon the door would cause the stop portion to pass from under-heath the head 11 and thus allow the door to complete its closing movement. Due to the double incline of the stop portion 16, it Will readily pass undein'eath the head 11 in either dire'ctien of movement of the door. It will be observed that due to the fact that the hub of the plate15 surrounds the stud 12, it Will, when the plate is flexed, as shovvn in Figures 2 and 3, bear against the under face of the head 11 on the far side of the pivot, as Well as on the upper face of the head '3 on the near side of the pivot, thereby relieving the bend ing strain on the stud.

By setting up the nut 14L it Will be understood that the plate 15 Will be clamped by the sli'ould'ei 13 against the head 3 so that this head and the plate 15 will move together, While the head 11 Will pivot freely upon the upper or larger portion off the stud 12. The head 3 and the stud 12 are connected together so that the stud is caused to rotate with the liead 3; In the construction Sl'lOWll this co'nn'ectioi'i consists of a key 17 which fits in a slot in the head 3", the plate 15 having a corresponding slot to permit the key to pass therethrough as the stud is inserted.

It is evident that the plate 15 may be angularly adjusted on the stud 12 to vary the position at which the door Will be held open merely by letting up on the nut 14:.

Due to the fact that the holding or step device operates on the ends of the arms, the maximum leverage is attained and a very effective, as Well as simple step is thus provided.

It is obvious that various modifications may be made in the construction shown in the drawings and above parjtici'ila-rly described Within the principle and scope of my invention.

I claim:

1. A door check comprising, in combination with a closing mechanism arranged to be secured to a door, a lever arm operatively carried by the closing mechanism, a fulcrum arm arranged to be secured to a door casing and having pivotal connection With the lever arm, and a spring plate mounted to move with one of the arms and adjustable relative thereto and having a stop portion adapted to engage the adjacent side of the other arm in yieldable stop relation.

2-. A door check comprising, in combinm tion With closing mechanism arranged to be secured to a door, a lever 'operatively carried by the closing mechanism, a fulcrum arm arr-tinged to be secured to a door casing and having pivotal coi'inecti'o'n with the lever arm, and a spring plate adjustablmounted on said pivotal connection ant movable with the lever arni and having near its free end an offset stop portion adapted to ei'igage' the adjacent side of the fulcrum arm in yieldabl'e stop relation.

8. A door check comprising, in coinhin'zttion with a clo ingmechanism arran ed to be secured to a door, a lever 'arm operatively secured at one end to the door-closing mechanism, afulcrum arm arranged to be secured at oi'ie end to a door casing, a shouldered stud passing through the other ends of the arms and ivotahy securin them together, a spring plate mounted on the stud between the arms and having an offset stop portion on its free end on it's face adjacent one or the arms, and means coeperating with said shmuder on the stud to clam the spring plate and other arm together against relative movement.

4:. A door check mechanism comprising, in combination with a closing mechanism arranged to be secured to a door, a lever arm 'op'erativ'ely 's'e'cure'd at one end to the door closing mechanism, a rulers-n1 arm arranged to be pivotally secured at one end to door casing ahd having at its other end a head with the corners on its lower side rounded, a pivot 'stud passing through said head tuid through the end "of the lever arm with the fulcrum arm uppermost, the "s't ud being reflduce'd. in diameter for part of its length forming an undercut 'shoiild'er "at the plane of the bottom of the head, a spring plate 'pivo't ally be'aring on the stud between the two arms and angul'a rly adjustable thereon and having its "outer end upwardly onset to form a donb-l'e inclined stop adafpted to engage the rounded 'i'iurd'er shrfa'ce oft said head, andfmeans on the stud cooperating with said shoulder 'tocla-mp the spring plate and lever arm together against relative movement.

5. A door check mechanism comprising, in combination with a closing mechanism arranged to be secured to a door, a lever arm operas-rely secured'a t one eii'd to the door closing mechanism, a fulcrum erm,ar.-. ranged to be pi'votailly secured one 61, a door casing and having at its other end a head with the corners on its lower side rounded, a pivot stud passing through said head and through the end of the lever arm with the fulcrum arm uppermost, the stud being reduced in diameter for part of its length forming an undercut shoulder at the plane of the bottom of the head, a spring plate pivotally bearing on the stud between the two arms and angularly adjustable thereon and having its outer end upwardly offset to form a double inclined stop adapt-- ed to engage the rounded under surface of said head, means on the stud cooperating with said shoulder to clamp the spring plate and lever arm together against relative movement and a slot and key connection between the stud and lever arm.

6. A door check comprising, in combination with a closing mechanism arranged to be secured to a door, a lever arm operatively carried by the closing mechanism, a fulcrum arm arranged to be secured to a door casing, a stud pivotally connecting the free ends of the arms, a spring plate confined between the connected ends of the arms and movable with one of the arms and having a hub portion surrounding the stud and an outwardly extending arm with a stop portion thereon engageable with the other arm to control the relative pivotal movement of the arms, whereby the hub portion of the plate bears against the opposing faces of the pivotally connected ends of the arms on opposite sides of the stud during the flexing of the spring arm on the plate.

In witness whereof, I hereunto subscribe my signature.

BRUNO WEBER. 

